# Descriptive Statistics (by LabCE)

2 P.A.C.E. contact hour(s)

(based on 318 customer ratings)

Course provided by LabCE.

This course discusses statistics that are used in the laboratory for assessment of quality control.

See more courses in: Quality Control & Lab Math

### Continuing Education Credits

 P.A.C.E.® Contact Hours (acceptable for AMT, ASCP, and state recertification): 2 hour(s)Course number 578-020-12, approved through 9/1/2018
 Florida Board of Clinical Laboratory Personnel Credit Hours - Supervision/Administration, Quality Control/Quality Assurance, and Safety: 2 hour(s)Course number 20-547651, approved through 9/1/2018

### Objectives

• Explain why knowledge of statistics is important to laboratory scientists.
• Define terms that are associated with descriptive statistics and apply them to specific situations.
• Prepare tables and figures of data that meet the criteria specified in this unit.
• Describe "frequency distribution" and explain the advantage of presenting data in this manner.
• Given a set of data, construct a frequency table according to criteria stated in this unit.
• Given a set of data, construct both actual and relative frequency distributions that accurately represent the discrete or continuous nature of the data.
• Given a set of data, calculate its variance and standard deviation.
• Given the mean and standard deviation of a set of data in a normal distribution, find the ranges encompassing 68%, 95%, and 99% of all observations.
• Describe at least two situations in which coefficient of variation is a useful tool.
• Calculate coefficient of variation when given the mean and standard deviation of a set of data.
• Explain how coefficient of variation is used in the clinical laboratory.

### Customer Ratings

(based on 318 customer ratings)

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### Course Outline

• Introduction to Statistics
• Introduction to Statistics
• Why Statistics?
• Descriptive Statistics
• Definition of Statistics Terms
• Samples and Populations
• Statistics and Parameters
• Independent and Dependent Variables
• Discrete and Continuous Data
• Graphic Representation of Data
• Importance of Professional Tables and Graphs
• Table Specifications
• Figures Specification
• Frequency Distribution
• Data and Data Pairs
• Using Frequency Distributions
• Constructing Frequency Distributions
• A Frequency Distribution Example
• Step 1: Select Size and Number of Class Intervals
• Step 2: List the Class Intervals
• Step 3: Sort the Data
• Step 4: Determine Frequencies
• Step 5: Determine Relative Frequencies
• Graphing Frequency Distributions
• Bar Chart
• Histogram
• Frequency Polygon
• Absolute vs. Relative Frequency
• Measures of Central Tendency
• Mean, Median, and Mode
• Mean
• Median
• Mode
• Standard Deviation
• Standard Deviation (continued)
• Standard Deviation Example
• Standard Deviation Example (continued)
• Normal Distribution
• Introduction to the Normal Distribution
• Normal Distribution
• 68-95-99 Rule Illustrated
• Inferences from Sample Data
• Coefficient of Variation
• A Measure of Relative Variability
• Using the Coefficient of Variation
• Monitoring Methods

Level of instruction: Intermediate

Intended audience: This course is appropriate for laboratory professionals, and for students in clinical laboratory science programs who want a review of the statistics that are analyzed for assessment of quality control.

Author information: Beverly Schieltz, MS, MT(ASCP), is a lecturer in the Department of Biological Sciences at Wright State University located in Dayton, Ohio.

Brad Westover received his BS in Physics in 2006 from the California Institute of Technology. He is currently pursuing a Ph. D. at the University of California, San Diego.

Reviewer: Barbara Cebulski, MS, MLS(ASCP)CM  is a Program Director for MediaLab, Inc. She holds a Masters in Instructional Technology.

About the Course: This course is part of a series of courses adapted for the web by MediaLab Inc. under license from Educational Materials for Health Professionals Inc. Dayton OH, 45420. Copyright EMHP. It was reviewed and revised August 2012.

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Course provided by LabCE.

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